Results 51 to 60 of about 3,069 (195)

Optimization of fibre-reinforced composites for lightweight ballistic body armour

Applications in Engineering Science
This study presents an innovative approach to optimizing fiber-reinforced composite materials for ballistic body armor, enhancing protection against 7.62 mm AK-47 rifle bullets.
Elias Wakshume, Semayat Fanta, Solomon Seid, Kumlachew Yeneneh   +3 more
doaj   +1 more source

Crash Behavior of DP800–DP1000 Advanced High‐Strength Steel’s Dissimilar Resistance Spot Welded Joints Under Quasi‐static and High Strain Rates

steel research international, EarlyView.
The high‐strain‐rate behavior of resistance spot‐welded DP800–DP1000 joints is investigated. Results show that microstructural gradients across BM–HAZ–FZ govern hardness, strain rate sensitivity, and failure modes. While strength increases with strain rate, energy absorption is controlled by ductility, with DP800–DP800 joints showing superior ...
Pankaj Shrivastava, Velaphi Msomi
wiley   +1 more source

Effect of Different Surface Treatments on Resistance to Abrasive Wear of AISI 4140 Steel

steel research international, EarlyView.
This study investigates how different surface treatments affect resistance to abrasive wear of AISI 4140 Steel. The wear rate was significantly higher in samples subjected to conventional treatments than in samples coated using the HVOF process, demonstrating the superior efficiency of coatings applied by thermal spraying in mitigating abrasive wear ...
Everton Freitas de Oliveira, Tomasz Trzepieciński, Valmir Dias Luiz, Jorge Luis Coleti   +3 more
wiley   +1 more source

Recent Advances in Oriented Hydrogels: From Fundamental Mechanisms to Future Challenges

SusMat, EarlyView.
Traditional hydrogels suffer from weak mechanical properties and limited functionality due to their random polymer networks. This review comprehensively summarizes the reinforcement mechanisms of oriented structure for hydrogels, the design/fabrication strategies, and the latest application progress of high‐strength oriented hydrogels.
Chang Xu, Xijing Zhuang
wiley   +1 more source

Preparing to Fight the ‘Wrong War’? Why the UK Defence Budget Must Focus More on ‘National Resilience’

The Political Quarterly, EarlyView.
Abstract This article argues that the current debate over defence spending in the United Kingdom is fundamentally flawed. Too much emphasis is being placed on preparing for a form of warfare with Russia that is unlikely to occur. As this article points out, the Russians actually want to avoid a traditional battlefield confrontation with NATO.
Rod Thornton
wiley   +1 more source

Thermal persistence and physicochemical modification of inorganic gunshot residue (IGSR)

Journal of Forensic Sciences, EarlyView.
Abstract In the medicolegal context, GSR analysis plays a key role in clarifying the dynamics of firearm‐related deaths, including lesion identification and firing distance determination. However, postmortem alterations of the body, such as thermal exposure, may influence the analysis of lesions and complicate interpretation.
Gianmarco Argentiero, Barbara Bertoglio, Nicolas Martinelli, Giulia Pezzoni, Giorgio Marrubini, Federica Maraschi, Giovanni Cecchetto, Silvia D. Visonà, Daniele Merli   +8 more
wiley   +1 more source

Optimizing Viscoelastic Properties of Rubber Compounds for Ballistic Applications

Applied Sciences, 2020
Using interlayers of rubber adds a positive effect to the synergy of disruptor–absorber armors. Emerging from its viscoelasticity the material is able to transform mechanical stress into heat.
Janis Karl, Franziska Kirsch, Norbert Faderl, Leonhard Perko, Teresa Fras   +4 more
doaj   +1 more source

The Unintended Consequences of German Deterrence

Global Policy, EarlyView.
ABSTRACT Germany's evolving deterrence posture boils down to continued participation in NATO nuclear sharing and an ambitious conventional rearmament program. Due to its non‐nuclear status and a result of decades of underinvestment, Germany prioritizes modern conventional weapons.
Ulrich Kühn
wiley   +1 more source

Long-term natural ageing effects on the structural, mechanical, and ballistic performance of UHMWPE-based soft ballistic inserts

Materials & Design
The aim of the study was to evaluate the degradation mechanisms of ultra-high molecular polyethylene (UHMWPE) fibres used in soft ballistic inserts manufactured in 2003 and 2005 and used and stored in conditions typical for this type of products.
Katarzyna Kośla, Stefan Cichosz, Marcin H. Struszczyk, Wioleta Urbaniak, Ivan Domenech, Lucas Frochoso, Marzena Fejdyś   +6 more
doaj   +1 more source

The Use of Resistant Glass in Special Agricultural Machinery and the Logistic Support Depending on Operating Temperatures

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2017
The paper is concerned with quality assessment of bullet‑resistant glass in relation to ambient temperatures. The measurement results provided below may be drawn on in the field of logistics when transport, special as well as special agricultural ...
Tomáš Binar, Jiří Švarc, Stanislav Rolc, Petr Dostál, Michal Šustr   +4 more
doaj   +1 more source